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Brian Fitzpatrick's user avatar
Brian Fitzpatrick's user avatar
Brian Fitzpatrick
  • Member for 11 years, 7 months
  • Last seen more than a week ago
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I am a Lecturer in the mathematics department at Duke University.

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16
Understanding the definition of the quotient stack $[X/G]$
Mar 3, 2014
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10
Do matrices of the form $A^\ast A$ where $A$ has entries in $R\subset\Bbb C$ account for all positive semidefinite matrices with entries in $R$?
Dec 13, 2019
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4
When does a discrepant toric resolution induce a crepant resolution of a subvariety?
Jul 11, 2017
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Are there any interesting examples of geometric triangulated categories with the Jordan-Holder property?
Jul 22, 2016
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202
How can I create a link to a local file on a locally-run web page?
103
How do I create a blank PDF from the command line?
50
How to find the determinant of this $3 \times 3$ Hankel matrix?
41
Why is $\cos (90)=-0.4$ in WebGL?
36
showing exact functors preserve exact sequences (abelian categories, additive functors, and kernels)